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Home >> Toyota >> 2012 >> Matrix Base, Standard Trans >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (2ZR-FE) (Diagnostic Codes (P0010 - P0420) >> SFI System >> DTC P0171: System Too Lean (Bank 1); DTC P0172: System Too Rich (Bank 1) >> Typical Malfunction Thresholds
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Typical Malfunction Thresholds

EVAP purge-cut Executing
Either of following conditions 1 or 2 met -
1. Average between short-term fuel trim and long-term fuel trim 35% or more (varies with engine coolant temperature)
2. Average between short-term fuel trim and long-term fuel trim -35% or less (varies with engine coolant temperature)